Island



(No Model.)

R. ASHWORTH. BAGK BEND APPARATUS FOR CARD SETTING MACHINES.

Patented-May 13, 1890.

INVENTOR. 06m? J74%w0 r%.

, bend.

UNITED STATES PATENT OFFICE.

ROBERT ASHWVORTH, OF PROVIDENCE, RHODE ISLAND.

BACK-BEND APPARATUS FOR CARD-SETTING MACHINES.

SPECIFICATION forming part of Letters Patent No. 427,950, dated May 13, 1890.

Application filed January 21, 1890. $erial No. 337,647. (No model.)

To all whom it may concern:

Be it known that I, ROBERT ASHWORTH, a citizen of the United States of America, residing at Providence, Rhode Island, have in vented certain Improvements in the Back- Bend Apparatus for Card-Setting Machines, of which the following is a specification.

In the ordinary card-.settin g machine, which is used in the manufacture of the wire cards employed in the carding of textile materials, a severed length of wire is seized by the crown and bent into the form of a staple with the aid of the doubler and of side pressers, which are advanced and push inward the two ends of the wire. This staple is then thrust through the foundation fabric of the card by an advance movement of the crown which holds the staple. The two limbs of the staple which project from the back of the foundation fabric pass over and about in contact with the upper edge of a fixed bar, termed the back-rest. All these parts and actions are common to all ordinary card-setting machines and are well known. The parts to which my invention relates now come into action. The two ends of the staple which pass over the said backrest enter within two hooks, termed back-dies or crookers, which are carried by the back-bend. In the ordinary machine the back-bend is in the form of a swing-frame,which rocks upon centers which are carried by a bracket secured to the back of the machine. The said swing-frame is rocked by means of a connecting-rod which is connected with a lever which receives motion from the cam-shaft. The said swingframe, bein g very heavy and not being directly acted upon by the cam-shaft, does not work well at high speeds. The means adopted for adjusting the back-dies render the necessarily delicate adjustment of the parts very difficult.

The object of my invention is to remedy these defects. I carry the back-bend by means of a rock-arm, which is mounted in centers carried on the front part of the machine, so that the action of the cam is direct upon the I also improve the arrangements for carrying and adjusting the back-dies.

I will describe my invention with reference to the drawings.

Figure 1 is aside view of the improved backbend with its arm, and shows in section the cam-shaft of the ordinary card-setting machine. Fig. 2 is a plan of the said back-bend and arm. Fig. 3 is a back end view of the same. Fig. 4, partly in section, is a plan of the back-bend alone. Fig. 5 is a back view of the same. Fig. 6 represents a cross-section of the lower end of one of the heads which carry the back-dies or doublers.

In Fig. l a is the cam-shaft. Z) is the crown, which holds the length of wire. 0 is the doubler, which descends in front of the wire preparatory to the wire being bent into a staple, and d is the back-rest, upon which the limbs of the staple are bent, these parts being the same as in the ordinary machine. A stop-inotion finger c has also been used prior to my invention. The improved back-bend and arm consists of a lever-arm F, carrying the back-bend G. The arm F is at tached toa saddle f, which is mounted in a bracket h, which is secured to the bed of the card-setting machine. The said bracket is formed with two vertical limbs h, which carry screw-centers 7L2. In Fig. 1 one of these limbs is removed to show the saddle f. The said saddle is formed with a recess on the under side to receive the arm F, which is fitted to the said recess, and is secured in position by means of screws f The holes in the saddle for the said screws are slotted, in order that the arm F may be adjusted lengthwise on the saddle. The center points of the screws 7L2 enter conical holes in the two ends of the saddle, so that the saddle, and with it the parts F and G, can rock on the said centers.

In Figs. 1 and 3 it will be seen that two center holes f f 3 are formed in each end of the saddle, and in Fig. 3it will be seen that two corresponding tapped screw-holes are formed in the bracket at Its. The object of this is to vary the action of the bend, as will be mentioned hereinafter. The arm F is formed with a socket to receive the shank of a steel stud 1', upon which the cam a acts as the shaft a revolves. As the head of this stud and the cam become reduced by wear the stud can be set up by means of a screw 'i'. This provision for setting up may be dis- 5 per end of a back-die levcrj pensed with. A spiral spring 1" keeps the head of the stud i in contact with the cam. The back-bend G is provided with two ordinary back-dies or doublersj. ID will be seen that when the stud ii is lifted by the action of the cam the said back -dies will be depressed, the arm swinging upon the centers 72 This depression of the back-dies has the effect of bending down the limbs of the wire staple upon the edge of the back-rest d, as is usual. \Yhen using tempered-steel wire, which does not bend so readily as iron wire, I work with the centers in the top holes in the saddle. This has the effect of causing the back-dies to move a little nearer to the back-rest as they bend down the limbs of the staple, so that a better set is given to the wire. In the ordinary arrangement the back-dies move away from the back-rest in the bend ing operation. The lower centers are intended to be used for iron wire. If considered to be sufiicient, only one set of centers may be provided.

The back-bend G is formed with a cylindrical shank 5 which titsasocket bored in the end of the arm F. One sideof this socket is slit, as seen at In in Fig. l, and a screw it" passes through the two sides, which are separated by this slit. The back-bend can be ad justed by sliding the shank in the socket or by turning it upon its axis therein, and when adjusted be seeurel y clamped by tightening the screw 1.7.

The back-dicsj are each secured in the up- Eaeh lever is hinged at t to a head in, which is formed upon a spindle in, which is titted in sockets bored in two blocks 9 y which are connected by two disks g, the parts g, g and q being formed in one piece, which is centered, so that the parts g y" can be turned in the lathe. Each leverj fits between two checks in a recess formed in the head on, as indicated by Fig. (3, which represents a cross-section of the lower end of one of the heads on. A screw m passes through the two checks of the head and through a slot in the lever j the said slot permittin g the lever to swing to a slight extent upon the upper center at l. A l1ght spring 7' tends to keep the lever up against the back of the recess; but the resistance offered by the limbs of the staple to the bending is sufficient to overcome the said spring and to move the lever j outward and away from the back of the recess in m to the slight extent permitted bythe screw 011 Such n'iovement prevents the lower end of the lever y from striking the stop-finger 0; but in the event of a staple not being passed through the fabric the said lever strikes the finger c, which acts upon the parts which arrest the movements of the machine, as is usual. This stoppingot the machine forms no part of my invention, but I consider the manner in which the lever j is mounted to be novel. Each spindle m is free to turn in its sockets, as well as to slide therein. These movements are restrained by means of a spiral spring or, which is compressed between the block g and a finger which is upon the spindle m, the spring being also secured by its ends to the two parts and applied so as to have a torsional resistance. The eit'ect of the springs in both cases is by expansive ellfort to keep the back ends of the spindles in contact with set-screws 0 o in the block g and by torsional effort to keep each fingern in contact with the end of a set-screw 2) in the disk g. It will be seen that by turning the screws 0 the two back-dies can be adjusted with relation to the back-rest d, and by turning the screws p the upper hooked ends can. be set closertogethcr or tartherapart, as required, to suit the size of staple to be formed, the last-named adjustment; being effected by the turning of the spindles m in their sockets. The resistances of the two spiral springs by keeping the parts in close contact with the ends of the screws 0 and p prevent backlash, so that the parts answer at once to the turning of the screws in either direction, and a delicate adjustment can be obtained without difficulty or loss of. time.

Having fully described my invention, I add, in conclusion, that I claim 1. The combination of the frame and backrest of acard-setting machine and an operating-cam with an arm 1 pivoted to the frame and acted on by the said cam, and aback-bend G, carried by the arm, all substantially as described.

2. The combination of the frame and backrest of a card-setting machine and an operating-cam with an arm F, carryingthe backbend and having a wearing-face for the cam, a saddle on the arm, pivoting centers 011 which the saddle swings, and a spring to keep the said wearing-face on the arm in contact with the cam.

The combination of the frame and backrest of a card-setting machine with an arm, the back-bend carried by the arm, a saddle on the said arm having two sets of center holes, a bracket on the frame having corresponding center holes, removable centers, and a cam to act on the arm, all substantially as described.

it. The combination of the f rame and backrest of a card-setting machine, the crown and doublers with the back-bend, spindles adapted to turn and slide in sockets in the bend and carrying levers, doublcrs mounted on the said levers, springs acting upon the spindles to turn and move them forward, and adjustingscrews to act upon the spindlesin opposition to the springs, all substantially as dcscril led.

5. The combination of the frame and backrest of a card-setting machine with an arm, the back-bend carried thereby, consisting of a shank fitted in a socket in the arm, two opposite disks and blocks g 9 with spindles vers, and screws to limit their movement, all

carrying levers j, and doublers mounted on substantially as set forth. I I0 the levers, all substantially as described. In Witness whereof I have hereunto set my 6. The combination of the frame and backhand in presence of two witnesses. rest of a card-setting machine with a back- ROBERT ASHWORTH. bend, spindles therein having heads m, le- Vitnesses: versj', carrying the doublers and pivoted in J ENTWISLE,

said heads, springs acting upon the said le- EDWARD L. DUTTON. 

